There used to be video up on the net of an F-111 tearing down some canyon at night in terrain following mode. That took some brass ones on the part of the crew.
You would have to have complete trust and confidence in the equipment. Because at that altitude there is zero recovery time. Just sit back, let go of the stick, close your eyes and try not to barf.
I used to ride in the back of the EC-130H Compass Call. I never got sick during the worst of the maneuvers the crew put the bird through. The only time I actually got sick was due to a slight bucking headwind that made it feel like we were on an undulating ship on the water. Funny thing is, I don't normally get seasick, either. When you fly there are only two types of people. Those who have gotten sick and those who will.